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//===-- HexagonTargetMachine.cpp - Define TargetMachine for Hexagon -------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Implements the info about Hexagon target spec.
//
//===----------------------------------------------------------------------===//
#include "HexagonTargetMachine.h"
#include "Hexagon.h"
#include "HexagonISelLowering.h"
#include "HexagonMachineScheduler.h"
#include "HexagonTargetObjectFile.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/IR/Module.h"
#include "llvm/PassManager.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Transforms/IPO/PassManagerBuilder.h"
#include "llvm/Transforms/Scalar.h"
using namespace llvm;
static cl:: opt<bool> DisableHardwareLoops("disable-hexagon-hwloops",
cl::Hidden, cl::desc("Disable Hardware Loops for Hexagon target"));
static cl::opt<bool> DisableHexagonMISched("disable-hexagon-misched",
cl::Hidden, cl::ZeroOrMore, cl::init(false),
cl::desc("Disable Hexagon MI Scheduling"));
static cl::opt<bool> DisableHexagonCFGOpt("disable-hexagon-cfgopt",
cl::Hidden, cl::ZeroOrMore, cl::init(false),
cl::desc("Disable Hexagon CFG Optimization"));
/// HexagonTargetMachineModule - Note that this is used on hosts that
/// cannot link in a library unless there are references into the
/// library. In particular, it seems that it is not possible to get
/// things to work on Win32 without this. Though it is unused, do not
/// remove it.
extern "C" int HexagonTargetMachineModule;
int HexagonTargetMachineModule = 0;
extern "C" void LLVMInitializeHexagonTarget() {
// Register the target.
RegisterTargetMachine<HexagonTargetMachine> X(TheHexagonTarget);
}
static ScheduleDAGInstrs *createVLIWMachineSched(MachineSchedContext *C) {
return new VLIWMachineScheduler(C, make_unique<ConvergingVLIWScheduler>());
}
static MachineSchedRegistry
SchedCustomRegistry("hexagon", "Run Hexagon's custom scheduler",
createVLIWMachineSched);
/// HexagonTargetMachine ctor - Create an ILP32 architecture model.
///
/// Hexagon_TODO: Do I need an aggregate alignment?
///
HexagonTargetMachine::HexagonTargetMachine(const Target &T, StringRef TT,
StringRef CPU, StringRef FS,
const TargetOptions &Options,
Reloc::Model RM, CodeModel::Model CM,
CodeGenOpt::Level OL)
: LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
TLOF(make_unique<HexagonTargetObjectFile>()),
Subtarget(TT, CPU, FS, *this) {
initAsmInfo();
}
HexagonTargetMachine::~HexagonTargetMachine() {}
namespace {
/// Hexagon Code Generator Pass Configuration Options.
class HexagonPassConfig : public TargetPassConfig {
public:
HexagonPassConfig(HexagonTargetMachine *TM, PassManagerBase &PM)
: TargetPassConfig(TM, PM) {
// FIXME: Rather than calling enablePass(&MachineSchedulerID) below, define
// HexagonSubtarget::enableMachineScheduler() { return true; }.
// That will bypass the SelectionDAG VLIW scheduler, which is probably just
// hurting compile time and will be removed eventually anyway.
if (DisableHexagonMISched)
disablePass(&MachineSchedulerID);
else
enablePass(&MachineSchedulerID);
}
HexagonTargetMachine &getHexagonTargetMachine() const {
return getTM<HexagonTargetMachine>();
}
ScheduleDAGInstrs *
createMachineScheduler(MachineSchedContext *C) const override {
return createVLIWMachineSched(C);
}
bool addInstSelector() override;
bool addPreRegAlloc() override;
bool addPostRegAlloc() override;
bool addPreSched2() override;
bool addPreEmitPass() override;
};
} // namespace
TargetPassConfig *HexagonTargetMachine::createPassConfig(PassManagerBase &PM) {
return new HexagonPassConfig(this, PM);
}
bool HexagonPassConfig::addInstSelector() {
HexagonTargetMachine &TM = getHexagonTargetMachine();
bool NoOpt = (getOptLevel() == CodeGenOpt::None);
if (!NoOpt)
addPass(createHexagonRemoveExtendArgs(TM));
addPass(createHexagonISelDag(TM, getOptLevel()));
if (!NoOpt) {
addPass(createHexagonPeephole());
printAndVerify("After hexagon peephole pass");
}
return false;
}
bool HexagonPassConfig::addPreRegAlloc() {
if (getOptLevel() != CodeGenOpt::None)
if (!DisableHardwareLoops)
addPass(createHexagonHardwareLoops());
return false;
}
bool HexagonPassConfig::addPostRegAlloc() {
const HexagonTargetMachine &TM = getHexagonTargetMachine();
if (getOptLevel() != CodeGenOpt::None)
if (!DisableHexagonCFGOpt)
addPass(createHexagonCFGOptimizer(TM));
return false;
}
bool HexagonPassConfig::addPreSched2() {
const HexagonTargetMachine &TM = getHexagonTargetMachine();
addPass(createHexagonCopyToCombine());
if (getOptLevel() != CodeGenOpt::None)
addPass(&IfConverterID);
addPass(createHexagonSplitConst32AndConst64(TM));
printAndVerify("After hexagon split const32/64 pass");
return true;
}
bool HexagonPassConfig::addPreEmitPass() {
const HexagonTargetMachine &TM = getHexagonTargetMachine();
bool NoOpt = (getOptLevel() == CodeGenOpt::None);
if (!NoOpt)
addPass(createHexagonNewValueJump());
// Expand Spill code for predicate registers.
addPass(createHexagonExpandPredSpillCode(TM));
// Split up TFRcondsets into conditional transfers.
addPass(createHexagonSplitTFRCondSets(TM));
// Create Packets.
if (!NoOpt) {
if (!DisableHardwareLoops)
addPass(createHexagonFixupHwLoops());
addPass(createHexagonPacketizer());
}
return false;
}
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